Low Power 128 Point Split Radix FFT for LTE Application 

Abstract

-In this paper, we describe a processor architecture customized to Split radix FFT algorithm. The proposed architecture supports all FFT sizes, required by the LTE applications. The proposed design is aimed to reduce the area, latency, power and also to reduce the number of computational path in order to speed up FFT processor computation. The proposed low power 128 point split radix FFT architecture applies various periodicity properties of twiddle factors multiplier.We implement the processor in 128-point MDC architecture with split radix algorithm. The processor has been synthesized on a Xilinx ISE 10.1design technology and both energy-efficiency and performance have been evaluated.

SEC-TAED based Error Detection and Correction Technique for Data Transmission Systems

“…Overcome the above problem by developed the enhanced extended hamming (12,8) code for detection and correcting a single error as well as triple adjacent errors [8]. In the proposed method, the bit replacement algorithm is effectively used to change the order of the code word and to maximize the probability detection of triple adjacent error process.…”

“…The conventional hamming (13, 8) SEC-TAED code needs five parity bits to detect the triple adjacent errors. To avoid the problem, the method used hamming (12,8) code to detect the triple adjacent error. The proposed bit-reordered format is used to maximize the probability of detecting the triple adjacent error.…”

“…Bit error rate (BER) analysis is to be performed to verigy the quality of the communication network devices [10]. High speed error detection and correction techniques and FFT architectures are widely used in the MIMO OFDM networks to achieve the high data rate [11] [12].…”

Orthogonality Measurent of OFDM Signal

“…In [7] presented the maximizing energy efficiency for consumption circuit power in downlink massive MIMO wireless networks The receiver side of OFDM consists of cyclic prefix removal for remove the added bits in transmitter side, Fast Fourier Transformation (FFT) for convert the time domain signal into frequency one, De-modulation (reverse process of modulation), Channel Decoder for decode the encoded word, and Source decoder to convert digital decoded binary information to analog one. Low power 128 point split radix fft for LTE application has been described in [8]- [9].…”

Reconfigurable Modulation Scheme for Communication System

“…The obtained sampling frequency is 5.4MHz. The proposed adaptive modulation scheme of this work can able to meet the BER target at 25dB when compared to more than 28dB for 4-QAM fixed modulation scheme [6][7]. The proposed algorithm utilizes the average value of 625 the instantaneous SNR of the subcarriers in the sub-band as the switching parameter.…”